body{
    margin: 0px;
    padding: 0px;
}
.index{
    margin: 0;
    padding: 0;
}
.img1{
    width: 100%;
}
.img1>img{
    width: 100%;
}
.main{
    width: 90%;
    margin: 0 auto;
}
.main-item{
    width: 100%;
    height: 500px;
    display: flex;
    margin-bottom: 20px;
    
}
.item-box{
    width: calc(100% - 200px);
    height: 100%;
    
    display: flex;
    flex-wrap: wrap;
    justify-content: space-around;
    align-items: center;
    
}